<p>I only used the AP credits that satisfied my general requirements like history and English. The ones related to engineering I did not ‘accept’ as I still took the classes, which I found helpful as the curriculum for aerospace is four years no matter whether I took those classes or not. Also I had not taken calculus since 11th grade and it was a good refresher, especially since some of the principles were used in later classes. In my engineering group of friends, all but one that had AP classes like calculus and physics took the courses as well.</p>